iOptron® iEQ45 GEM with 42" Pier       priced at $1,888.-

iOptron® iEQ45 GEM with 45" Pier        priced at $1,948.-



The iEQ45 is the first in a new breed of premium astro-imaging mounts from iOptron. Now it comes available with a modified DEC clutch for free spin OTA balance.


The iEQ45 offers the next generation GoTo technology from iOptron —not to mention built-in 32-bit GPS. With a payload of 45 lbs. balanced – it comes standard with a calibrated dark field illumination polar scope with 42 inch pier. It also fits both Vixen and Losmandy-type mounting plates.  Its lighter weight (only 25 lbs.) makes it much easier to carry.




◦ Specialized astrophotography mount ideal for entry-level and intermediate astrophotographers

◦ Payload: 45 lbs

◦ Mount weight: 25 lbs

◦ Portable, compact, and sturdy German equatorial mount with the highest Payload/Mount ratio

   (1.7)  in the category

◦ ST-4 autoguiding port capable of reverse guiding with auto-protection

◦ Permanent periodic error correction (PEC)

◦ Ultra-accurate tracking with temperature compensated crystal oscillator (TCXO)

◦ Gap-free structure for both R.A. and declination worms

◦ Built-in 32-channel GPS

◦ #8407 controller with Advanced GOTONOVA® GoTo Technology and heating mechanism

◦ Lowest working temperature: -20oC

◦ RS232 port for mount firmware upgrade and ASCOM control

◦ RS485 new command set completely open for user-defined control of the mount

◦ Resolution: 0.09 arc second

◦ Fits with both Vixen and Losmandy-type mounting plates

◦ Includes 42 inch Pier (Optional 2-inch tripod also available)

◦ Calibrated polar scope with dark-field illumination and easy polar alignment procedure, allowing

   for fast and accurate polar alignment

◦ Comes standard with: 2 x 5kg counterweight, AC adaptor, 12V DC car plug adaptor, RS232-RJ9

   cable and RS232 cable

Technical Specifications:



Mount Weight

Payload/Mount Weight

Right Ascension Worm Wheel

Declination Worm Wheel

Right Ascension Axis

Declination Axis

Motor Drive



Latitude Adjustment Range

Azimuth Adjustment Range


Polar Scope

Level Indicator

Hand Controller




Counterweight Bar




Power Consumption

Power Requirement

AC Adapter

Serial port

RS232 port

Firmware Upgrade

PC Computer Control

Working Temperature


German Equatorial Mount

45 lbs (20kg), excluding counterweight

20 lbs (11.4kg)


Ø130mm, 216 teeth aluminum

Ø115mm, 192 teeth aluminum

Ø50mm steel

Ø40mm steel

Planetary Gear Reducer DC servo with encoder

0.09 arc seconds

Synchronous belt/Gear

5° ~ 70°

± 6°

Internal 32-channel GPS

Yes. AccuAligningTM Polar Scope with dark field illumination

Precision bubble

Go2Nova® 8407 with 358,000 objects database

Permanent PEC




11 lbs (5kg) X 2 (included)

42” or 48”

Losmandy/Vixen dual saddle

0.25A(Tracking), 1.2A(GOTO)

12V DC(11 ~ 15V), 2Amp

100V ~ 240V (included)

Yes (on hand controller)

Yes (on mount)



-20°C ~ 40°C

Two year limited

iStar Optical and iOptron Mounts have partnered to create a winning combination.


A mount company that cares as much about quality as we do. We use the iOptrons personally. We now offer iOptrons mounts separately or as packages that include our scopes. Ask us about special pricing for complete packages including OTA, tube rings, dovetail and iOptrons mount.


Coming soon complete “Turn Key” packages for imaging including OTA, mount and guidescope.